Mice and rats cause an estimated billion dollars in vehicle damage every year in the U.S. — and if your car has been parked for a few weeks, sitting in a garage, or stored seasonally, you're a target. Modern automakers use soy-based wire coatings that rodents treat like a buffet, and once they find a warm engine bay, they nest, chew, and breed. This 16 oz peppermint oil rodent repellent spray is the simple, natural way to make your engine the least appealing spot on the block. The extra-strength formula uses concentrated peppermint essential oil to create a powerful scent barrier that rodents instinctively avoid — without poisons, traps, or harsh chemicals. How to use: Make sure the engine is cool. Shake well. Spray liberally on and around the engine bay, wiring harnesses, firewall, wheel wells, and any entry points. Repeat every 2–3 weeks, or sooner after heavy rain or washing. For storage vehicles, RVs, and boats, treat before parking and refresh monthly.